JPWO2012032888A1 - Bearing cap made of ferrous metal to be cast into a light alloy member - Google Patents

Bearing cap made of ferrous metal to be cast into a light alloy member Download PDF

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JPWO2012032888A1
JPWO2012032888A1 JP2012532911A JP2012532911A JPWO2012032888A1 JP WO2012032888 A1 JPWO2012032888 A1 JP WO2012032888A1 JP 2012532911 A JP2012532911 A JP 2012532911A JP 2012532911 A JP2012532911 A JP 2012532911A JP WO2012032888 A1 JPWO2012032888 A1 JP WO2012032888A1
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bearing cap
light alloy
cast
alloy member
ferrous metal
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JP5403166B2 (en
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浩明 持田
浩明 持田
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Nissan Motor Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/22—Internal combustion engines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Fencing (AREA)

Abstract

本発明は軽合金部材にコアとして鋳込まれる鉄系金属製のベアリングキャップであって、軸受面を形成する円弧状部と、円弧状部の両端に連ねて配置される左右のフランジ部と、左右のフランジ部の背面側に起立して配置され、取付ボルトを挿通するボス部と、を備える。そして、ボス部には、溝又は凸部が形成される。The present invention is a ferrous metal bearing cap cast as a core in a light alloy member, an arc-shaped portion forming a bearing surface, and left and right flange portions arranged to be connected to both ends of the arc-shaped portion, And a boss portion that is disposed upright on the back side of the left and right flange portions and through which the mounting bolt is inserted. And a groove | channel or a convex part is formed in a boss | hub part.

Description

本発明は、内燃機関のクランク軸ジャーナルを軸支持するベアリングキャップに関し、特に、軽合金部材にコアとして鋳込まれるベアリングキャップに関するものである。   The present invention relates to a bearing cap that supports a crankshaft journal of an internal combustion engine, and more particularly to a bearing cap that is cast as a core in a light alloy member.

ＪＰＳ６１−４５１０８Ａに記載されているように、従来から軸受カバー等の軽合金部材にコアとして鋳込まれる鉄系金属製のベアリングキャップが提案されている。   As described in JP 61-45108A, a ferrous metal bearing cap that has been conventionally cast as a core in a light alloy member such as a bearing cover has been proposed.

これは、夫々固定用ボルト穴を備える一対のボスと、ボス間において軸受面を形成してボス間を連結すると共に両側面に凹所を備える横部材と、によりコアとして鋳込まれるベアリングキャップを形成している。そして、このベアリングキャップをコアとして軸受カバー等の軽合金部材に一体に鋳込むことにより、軸受カバーの材料がコアの凹所内に入り込むことができ、両部材間の良好な結合が形成されるようにしている。   This includes a bearing cap that is cast as a core by a pair of bosses each having a fixing bolt hole and a transverse member that forms a bearing surface between the bosses to connect the bosses and has recesses on both side surfaces. Forming. And by casting this bearing cap as a core into a light alloy member such as a bearing cover, the material of the bearing cover can enter the recess of the core, so that a good bond between both members is formed. I have to.

しかしながら、上記従来例では、内燃機関の運転温度では、ベアリングキャップの凹所内に入り込んだ軽合金部材が、鉄系部材からなるベアリングキャップよりも大きく膨張するため、ベアリングキャップの軸受面を変形させるおそれがあった。   However, in the above-described conventional example, at the operating temperature of the internal combustion engine, the light alloy member that has entered the recess of the bearing cap expands more than the bearing cap made of an iron-based member, and thus the bearing surface of the bearing cap may be deformed. was there.

本発明はこのような問題点に着目してなされたものであり、軸受面を変形を小さくすると共に軽合金部材との結合性向上に好適な軽合金部材に鋳込まれる鉄系金属製のベアリングキャップを提供することを目的とする。   The present invention has been made paying attention to such problems, and is made of a ferrous metal that is cast into a light alloy member suitable for improving the bondability with the light alloy member while reducing deformation of the bearing surface. The purpose is to provide a cap.

上記目的を達成するため、本発明は、軽合金部材にコアとして鋳込まれる鉄系金属製のベアリングキャップが、軸受面を形成する円弧状部と、円弧状部の両端に連ねて配置される左右のフランジ部と、左右のフランジ部の背面側に起立して配置されて取付ボルトを挿通するボス部と、を備え、ボス部に溝又は凸部を形成したことを特徴とする。   In order to achieve the above object, according to the present invention, a ferrous metal bearing cap cast as a core in a light alloy member is arranged to be connected to an arc-shaped portion forming a bearing surface and both ends of the arc-shaped portion. It is characterized by comprising left and right flange portions and boss portions that are erected on the back side of the left and right flange portions and through which mounting bolts are inserted, and grooves or convex portions are formed in the boss portions.

本発明の実施形態、本発明の利点については、添付された図面を参照しながら以下に詳細に説明する。   Embodiments of the present invention and advantages of the present invention will be described in detail below with reference to the accompanying drawings.

図１は、本発明の一実施形態を示す軽合金部材に鋳込まれる鉄系金属製のベアリングキャップの概略構成図である。FIG. 1 is a schematic configuration diagram of a ferrous metal bearing cap cast into a light alloy member according to an embodiment of the present invention. 図２は、図１のII−II線に沿う断面図である。2 is a cross-sectional view taken along line II-II in FIG. 図３は、ベアリングキャップの斜視図である。FIG. 3 is a perspective view of the bearing cap. 図４は、ベアリングキャップのボス部の鋳造型を示す説明図である。FIG. 4 is an explanatory view showing a casting mold of the boss portion of the bearing cap. 図５は、ベアリングキャップの中央部の鋳造型を示す説明図である。FIG. 5 is an explanatory view showing a casting mold at the center of the bearing cap. 図６は、ベアリングキャップが鋳込まれたラダーフレームの平面図である。FIG. 6 is a plan view of a ladder frame in which a bearing cap is cast. 図７は、図６のVII−VII線に沿う断面図である。7 is a cross-sectional view taken along line VII-VII in FIG. 図８は、図６のVIII−VIII線に沿う断面図である。8 is a cross-sectional view taken along line VIII-VIII in FIG.

以下、本発明の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップを図１〜図６に示す一実施形態に基づいて説明する。   Hereinafter, a ferrous metal bearing cap cast into the light alloy member of the present invention will be described based on an embodiment shown in FIGS.

図１及び図３において、軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ１は、鉄系金属により形成している。ベアリングキャップ１は、軸受面を形成する円弧状部２と、円弧状部２の両端に連なって両側に延びるフランジ部３と、両フランジ部３の夫々の背面側に起立させて配置され、取付ボルトを挿通するボス部４と、を備える。また、ベアリングキャップ１は、円弧状部２の背面から離間させて配置され両ボス部４の先端側同士を連結する連結ビーム５と、連結ビーム５とボス部４との連結部分の夫々を、円弧状部２の背面に対して連結する一対の補強ビーム６と、を一体に備える。   1 and 3, a ferrous metal bearing cap 1 cast into a light alloy member is formed of ferrous metal. The bearing cap 1 is arranged so as to stand upright on the back side of each of the arc-shaped portion 2 forming the bearing surface, the flange portion 3 extending to both sides of the arc-shaped portion 2 and extending on both sides, and mounted. And a boss portion 4 through which the bolt is inserted. Further, the bearing cap 1 is arranged so as to be separated from the back surface of the arcuate part 2 and connects each of the connecting beam 5 that connects the tip ends of the boss parts 4 and the connecting part of the connecting beam 5 and the boss part 4. A pair of reinforcing beams 6 connected to the back surface of the arcuate part 2 are integrally provided.

前記軸受面を形成する円弧状部２とその両端に連なって両側に延びるフランジ部３とは、同一の幅及び厚みの矩形状の断面を備える。前記円弧状部２の円弧面には、図示しない軸受金属を介してクランクジャーナルを支持する軸受面を形成する。また、その両端に連なって両側に延びるフランジ部３の上面は平面に形成され、シリンダブロックのバルクヘッドの下端面に当接される。   The arc-shaped portion 2 that forms the bearing surface and the flange portion 3 that extends to both sides of the arc-shaped portion 2 have rectangular sections having the same width and thickness. A bearing surface for supporting the crank journal is formed on the arc surface of the arc-shaped portion 2 via a bearing metal (not shown). Further, the upper surface of the flange portion 3 that is continuous with both ends and extends on both sides is formed into a flat surface and is in contact with the lower end surface of the bulkhead of the cylinder block.

両フランジ部３の夫々の背面側に起立させて配置され、取付ボルトを挿通するボス部４は、前記フランジ部３を貫通させて２本のボルト穴１１を備え、このボルト穴１１を囲む２つのボス１０を備える。図２に示すように、２本のボルト穴１１は間隔を空けて配置され、このボルト穴１１を囲む２つのボス１０同士も間隔が空けられることにより、両ボス１０間にボス１０の肉厚に匹敵する深さの溝１２を形成している。前記ボス１０同士は、先端側において前記ボス１０間の溝１２を横断して配置したリブ１３により連結されている。即ち、ボス１０同士は溝１２を形成している薄肉部で連結されると共に基端側のフランジ部３と先端側のリブ１３とで互いに連結され、その剛性を高めている。このため、前記ボス１０間の溝１２は、前記リブ１３とフランジ部３背面とで両端が閉じられた盆地状空間（閉空間）に形成される。   A boss portion 4 which is arranged upright on the back side of each of the flange portions 3 and through which the mounting bolt is inserted is provided with two bolt holes 11 penetrating the flange portion 3 and surrounds the bolt holes 11 2. Two bosses 10 are provided. As shown in FIG. 2, the two bolt holes 11 are arranged at intervals, and the two bosses 10 surrounding the bolt holes 11 are also spaced apart, so that the thickness of the boss 10 is between the bosses 10. A groove 12 having a depth comparable to that of the groove 12 is formed. The bosses 10 are connected to each other by a rib 13 disposed across the groove 12 between the bosses 10 on the front end side. In other words, the bosses 10 are connected to each other by a thin portion forming the groove 12, and are connected to each other by the flange portion 3 on the proximal end side and the rib 13 on the distal end side, thereby enhancing the rigidity. For this reason, the groove | channel 12 between the said boss | hubs 10 is formed in the basin-like space (closed space) by which both ends were closed by the said rib 13 and the flange part 3 back surface.

前記連結ビーム５は、円弧状部２の背面から離間させて配置されており、両ボス部４の先端側同士を連結している。連結ビーム５は、ボス部４のボス１０同士を先端側で連結するリブ１３が配置された位置において、ボス部４に連結しており、リブ１３と連結ビーム５とは概略同一直線状に配置されている。   The connecting beam 5 is disposed so as to be separated from the back surface of the arc-shaped portion 2 and connects the tip ends of the boss portions 4 to each other. The connecting beam 5 is connected to the boss portion 4 at a position where the rib 13 for connecting the bosses 10 of the boss portion 4 on the tip side is arranged, and the rib 13 and the connecting beam 5 are arranged substantially in the same straight line. Has been.

一対のボス部４は、先端側でリブ１３が配置された位置において互いに連結ビーム５により連結されることにより、ボス部４同士は互いを支持するため、剛性を高め且つ軽量化が可能となる。即ち、基端側においてフランジ部３及び円弧状部２で互いに連結され、先端側で連結ビーム５により連結されることにより、強固な枠形状をなしてその剛性を向上させている。即ち、ベアリングキャップ１は、フランジ部３・円弧状部２・ボス部４・連結ビーム５を含む面を曲げる横曲げ方向剛性、これらの面内での縦曲げ剛性、及び、これらの面を捩る捩り剛性を高めることができる。   The pair of bosses 4 are connected to each other by the connecting beam 5 at the position where the ribs 13 are arranged on the tip side, so that the bosses 4 support each other, so that the rigidity can be increased and the weight can be reduced. . In other words, the flange portion 3 and the arc-shaped portion 2 are connected to each other on the proximal end side and are connected to each other by the connecting beam 5 on the distal end side, thereby forming a strong frame shape and improving its rigidity. That is, the bearing cap 1 has a lateral bending direction rigidity that bends a surface including the flange portion 3, the arc-shaped portion 2, the boss portion 4, and the connecting beam 5, a longitudinal bending rigidity within these surfaces, and twists these surfaces. Torsional rigidity can be increased.

前記一対の補強ビーム６は、連結ビーム５とボス部４との連結部分の夫々を、円弧状部２の背面に対して斜め方向に連結する。これにより、ボス部４・連結ビーム５・フランジ部３及び円弧状部２を含む面内の剛性を一層向上させることができる。   The pair of reinforcing beams 6 connect the connecting portions of the connecting beam 5 and the boss portion 4 in an oblique direction with respect to the back surface of the arcuate portion 2. Thereby, the in-plane rigidity including the boss part 4, the connecting beam 5, the flange part 3, and the arcuate part 2 can be further improved.

前記連結ビーム５と円弧状部２との間には、両側を補強ビーム６で囲まれた貫通空間１４が形成され、両補強ビーム６とボス部４との間にも一部円弧状部２の背面に接して貫通空間１５が形成される。   A through space 14 is formed between the connecting beam 5 and the arcuate part 2 and surrounded by the reinforcing beams 6 on both sides. A part of the arcuate part 2 is also formed between the reinforcing beams 6 and the boss part 4. A penetrating space 15 is formed in contact with the back surface.

以上の構成のベアリングキャップ１は、図４及び図５に示す成形型により、鋳造により形成される。図４は、ベアリングキャップ１のボス部４の鋳造型を示す説明図であり、図５は、ベアリングキャップ１の中央部の鋳造型を示す説明図である。前記成形型は、円弧状部２及びフランジ部３の形状に型彫りされたキャビティを備えた上型２１と、ボス部４のリブ１３及び連結ビーム５の中央からフランジ部３及び円弧状部２までの側面形状を備えた横型２２と、ボス部４のリブ１３及び連結ビーム５の中央から下側の形状のキャビティを備える下型２３と、で形成される。鋳造されたベアリングキャップ１の横型２２と下型２３及び上型２１との合せ面の部分には、バリが発生するが、これらのバリは連結ビーム５の中央部、リブ１３の頂部、円弧状部２及びフランジ部３の縁にあり、容易に取除くことができる。   The bearing cap 1 having the above-described configuration is formed by casting using the molding die shown in FIGS. FIG. 4 is an explanatory view showing a casting mold of the boss portion 4 of the bearing cap 1, and FIG. 5 is an explanatory view showing a casting mold of the central portion of the bearing cap 1. The mold includes an upper die 21 having a cavity engraved in the shape of the arc-shaped portion 2 and the flange portion 3, the flange 13 and the arc-shaped portion 2 from the center of the rib 13 of the boss portion 4 and the connecting beam 5. The horizontal mold 22 having the side shape up to the above and the lower mold 23 having the cavity of the lower shape from the center of the rib 13 of the boss portion 4 and the connecting beam 5 are formed. Burrs are generated at the mating surfaces of the horizontal mold 22 and the lower mold 23 and the upper mold 21 of the cast bearing cap 1, and these burrs are formed in the center of the connecting beam 5, the top of the rib 13, and the arc shape. It is at the edge of the part 2 and the flange part 3 and can be easily removed.

以上のように構成されたベアリングキャップ１は、図６に示すように、軽合金製で形成されるラダーフレーム３０に一体に鋳込まれる。即ち、図６はＶ型６気筒エンジンにおけるラダーフレーム３０であり、内部に鋳込まれたベアリングキャップ１を内蔵する４個のベアリングキャップ部３１と、これらベアリングキャップ部３１の両端面同士を連結してケースを構成する連結部３２と、から構成されている。   As shown in FIG. 6, the bearing cap 1 configured as described above is integrally cast into a ladder frame 30 formed of a light alloy. That is, FIG. 6 shows a ladder frame 30 in a V-type 6-cylinder engine, in which four bearing cap portions 31 containing a bearing cap 1 cast inside are connected to both end surfaces of these bearing cap portions 31. And a connecting portion 32 constituting the case.

ベアリングキャップ部３１に鋳込まれたベアリングキャップ１は、図７、８に示すように、円弧状部２およびフランジ部３を除く下部領域のボス部４、連結ビーム５および補強ビーム６が軽合金材料によりくるまれている。このため、ベアリングキャップ１の両側を補強ビーム６で囲まれた貫通空間１４及び両補強ビーム６とボス部４との間の貫通空間１５には軽合金材料が貫通させて充填されている。またボス部４も周囲が軽合金材料でくるまれており、そのボス１０の端部のみが軽合金材から露出された状態となっている。このため、ボス１０間にあってリブ１３とフランジ部３背面とで両端が閉じられて盆地状空間（閉空間）に形成された溝１２内にも軽合金材料が充填された状態となっている。   As shown in FIGS. 7 and 8, the bearing cap 1 cast into the bearing cap portion 31 is composed of a light alloy consisting of a boss portion 4, a connecting beam 5 and a reinforcing beam 6 in the lower region excluding the arc-shaped portion 2 and the flange portion 3. Wrapped with materials. For this reason, the light alloy material is penetrated and filled in the through space 14 surrounded by the reinforcing beam 6 on both sides of the bearing cap 1 and the through space 15 between both the reinforcing beam 6 and the boss portion 4. The boss 4 is also surrounded by a light alloy material, and only the end of the boss 10 is exposed from the light alloy material. For this reason, both ends are closed by the rib 13 and the back surface of the flange portion 3 between the bosses 10, and the light alloy material is also filled in the groove 12 formed in the basin-like space (closed space).

通常、ベアリングキャップ１は、ラダーフレーム３０鋳造後の軽合金材料の冷却による収縮力で保持されている。しかしながら、実動時はエンジン運転に伴う温度上昇により、軽合金材の膨張量と鉄系金属からなるベアリングキャップ１の膨張量との違いのために、前記した収縮力が低下し、保持力が低下する。   Usually, the bearing cap 1 is held by a contraction force due to cooling of the light alloy material after the ladder frame 30 is cast. However, during actual operation, due to the temperature rise accompanying engine operation, due to the difference between the amount of expansion of the light alloy material and the amount of expansion of the bearing cap 1 made of ferrous metal, the above-mentioned contraction force is reduced and the holding force is reduced. descend.

本実施形態においては、実動時の温度上昇により、ボス１０間にあってリブ１３とフランジ部３背面とで両端が閉じられて盆地状空間（閉空間）に形成された溝１２内に充填された軽合金材料は、リブ１３とフランジ部３とにより膨張が規制される。このため、溝１２内に充填された軽合金材料の膨張に応じて、リブ１３とフランジ部３背面との接触圧を上昇させる。これにより、ベアリングキャップ部３１の軽合金材料と鉄系材料で形成されたベアリングキャップ１との保持力低下を抑制できる。   In this embodiment, due to the temperature rise during actual operation, both ends of the rib 13 and the flange portion 3 are closed between the bosses 10 to fill the grooves 12 formed in the basin-like space (closed space). Expansion of the light alloy material is regulated by the rib 13 and the flange portion 3. For this reason, the contact pressure between the rib 13 and the back surface of the flange portion 3 is increased according to the expansion of the light alloy material filled in the groove 12. Accordingly, it is possible to suppress a decrease in holding force between the light alloy material of the bearing cap portion 31 and the bearing cap 1 formed of an iron-based material.

また、溝１２内に充填された軽合金材料が膨張しても、溝１２が形成されるボス部４は、軸受面が形成される円弧状部２から離れているため、軸受面の変形が少なくなる。さらに、溝１２が形成されるボス部４は、取付ボルトによって熱膨張が抑えられるため、軽合金材料との熱膨張差が大きくなり、ベアリングキャップ１と軽合金部材との結合性が高まる。   Further, even if the light alloy material filled in the groove 12 expands, the boss part 4 in which the groove 12 is formed is separated from the arcuate part 2 in which the bearing surface is formed. Less. Further, since the thermal expansion of the boss portion 4 in which the groove 12 is formed is suppressed by the mounting bolt, the difference in thermal expansion from the light alloy material is increased, and the bondability between the bearing cap 1 and the light alloy member is increased.

本実施形態においては、以下に記載する効果を奏することができる。   In the present embodiment, the following effects can be achieved.

軽合金部材にコアとして鋳込まれる鉄系金属製のベアリングキャップ１である。具体的には、軸受面を形成する円弧状部２と、円弧状部２の両端に連ねて配置される左右のフランジ部３と、左右のフランジ部３の背面側に起立して配置され、取付ボルトを挿通する一対のボス部４と、を備える。ボス部４には、溝１２が形成される。   This is a bearing cap 1 made of iron-based metal cast as a core in a light alloy member. Specifically, the arc-shaped portion 2 that forms the bearing surface, the left and right flange portions 3 that are connected to both ends of the arc-shaped portion 2, and the rear side of the left and right flange portions 3 are arranged upright. A pair of boss portions 4 through which the mounting bolts are inserted. A groove 12 is formed in the boss portion 4.

したがって、軽合金部材にベアリングキャップ１を鋳込むことにより、ボス部４に形成された溝１２内に軽合金材料が充填された状態となる。そして、実動時の温度上昇により、溝１２内に充填された軽合金材料が、溝１２によって膨張が規制されるため、軽合金材料と鉄系材料で形成されたベアリングキャップ１との保持力低下を抑制できる。結果として、軽合金部材との結合性を向上させることができる。また、溝１２が形成されるボス部４は、取付ボルトによって熱膨張が抑えられるため、軽合金部材との熱膨張差が大きくなり、ベアリングキャップ１と軽合金部材との結合性が高まる。   Therefore, by casting the bearing cap 1 in the light alloy member, the light alloy material is filled in the groove 12 formed in the boss portion 4. Further, since the expansion of the light alloy material filled in the groove 12 is restricted by the groove 12 due to the temperature rise during actual operation, the holding force between the light alloy material and the bearing cap 1 formed of an iron-based material. Reduction can be suppressed. As a result, the connectivity with the light alloy member can be improved. Moreover, since the thermal expansion of the boss | hub part 4 in which the groove | channel 12 is formed is suppressed with an attachment bolt, the thermal expansion difference with a light alloy member becomes large, and the bondability of the bearing cap 1 and a light alloy member improves.

ボス部４は、フランジ部３を貫通させて２本のボルト穴１１を備えると共にこのボルト穴１１を囲む２つのボス１０を備え、溝１２は両ボス間に形成される。また、ボス同士は、先端側においてボス間の溝を横断して配置したリブ１３により連結される。   The boss part 4 includes two bolt holes 11 penetrating the flange part 3 and two bosses 10 surrounding the bolt hole 11, and a groove 12 is formed between the two bosses. The bosses are connected to each other by a rib 13 disposed across the groove between the bosses on the tip side.

したがって、軽合金部材にベアリングキャップ１を鋳込むことにより、ボス１０間にあってリブ１３とフランジ部３背面とで両端が閉じられて盆地状空間（閉空間）に形成された溝１２内にも軽合金材料が充填された状態となる。そして、実動時の温度上昇により、ボス１０間にあってリブ１３とフランジ部３背面とで両端が閉じられて盆地状空間（閉空間）に形成された溝１２内に充填された軽合金材料は、リブ１３とフランジ部３とにより膨張が規制される。このため、溝１２内に充填された軽合金材料の膨張に応じて、リブ１３とフランジ部３背面との接触圧を上昇させ、軽合金材料と鉄系材料で形成されたベアリングキャップ１との保持力低下を抑制できる。結果として、ベアリングキャップ１の剛性を低下させることなく、軽合金部材との結合性を向上できる。   Therefore, by casting the bearing cap 1 into the light alloy member, both ends are closed by the rib 13 and the back surface of the flange portion 3 between the bosses 10 and the light is also lightened in the groove 12 formed in the basin-like space (closed space). The alloy material is filled. The light alloy material filled in the groove 12 formed in the basin-like space (closed space) between the bosses 10 due to the temperature rise during actual operation is closed between the rib 13 and the back surface of the flange portion 3. The expansion is regulated by the rib 13 and the flange portion 3. For this reason, according to the expansion of the light alloy material filled in the groove 12, the contact pressure between the rib 13 and the back surface of the flange portion 3 is increased, and the bearing cap 1 formed of the light alloy material and the iron-based material is used. A decrease in holding power can be suppressed. As a result, the connectivity with the light alloy member can be improved without reducing the rigidity of the bearing cap 1.

前記一対のボス部４は、リブ１３が配置された位置において互いに連結ビーム５により連結されているため、ボス部４同士は互いを支持して剛性を高め且つ軽量化が可能となる。   Since the pair of boss portions 4 are connected to each other by the connecting beam 5 at the position where the ribs 13 are disposed, the boss portions 4 support each other to increase the rigidity and reduce the weight.

前記一対のボス部４は、連結ビーム５が連結された部位の夫々を円弧状部２の背面に対して斜め方向に連結する一対の補強ビーム６を備えるため、ボス部４と円弧状部２との結合剛性をより一層向上させる。   The pair of boss portions 4 include a pair of reinforcing beams 6 that connect the respective portions to which the connection beams 5 are connected in an oblique direction with respect to the back surface of the arc-shaped portion 2. And the joint rigidity is further improved.

前記ベアリングキャップ１は、前記リブ１３及び連結ビーム５がある部位で型合せされる鋳造型により鋳造成形されるため、型合わせ面に形成されるバリを連結ビーム５の中央部及びリブ１３の頂部に位置させることができ、バリを容易に取り除くことができる。   Since the bearing cap 1 is cast and molded by a casting mold in which the ribs 13 and the connecting beam 5 are matched with each other, the burr formed on the die-matching surface is formed at the center of the connecting beam 5 and the top of the rib 13. The burr can be easily removed.

以上、この発明を特定の実施形態を通じて説明してきたが、この発明は上記実施形態に限定されるものではない。当業者にとっては、本発明の技術的範囲で上記実施形態にさまざまな修正あるいは変更を加えることが可能である。   As mentioned above, although this invention has been described through specific embodiments, this invention is not limited to the above embodiments. Those skilled in the art can make various modifications or changes to the above-described embodiments within the technical scope of the present invention.

例えば、上記実施形態では、ベアリングキャップのボス部に溝を形成し、溝内に軽合金材料を充填させて、ベアリングキャップと軽合金部材との結合性を向上させたが、ボス部に凸部１００（図３の破線部）を形成し、軽合金材料との間で凹凸を形成することによって、同様の効果を得ても構わない。   For example, in the above embodiment, a groove is formed in the boss portion of the bearing cap, and the light alloy material is filled in the groove to improve the coupling between the bearing cap and the light alloy member. A similar effect may be obtained by forming 100 (broken line portion in FIG. 3) and forming irregularities with the light alloy material.

以上の説明に関して２０１０年９月６日を出願日とする日本国における特願２０１０−１９９１１９号の内容をここに引用により組み込む。   Regarding the above explanation, the contents of Japanese Patent Application No. 2010-199119 in Japan, whose application date is September 6, 2010, are incorporated herein by reference.

Claims (6)

軽合金部材にコアとして鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
軸受面を形成する円弧状部（２）と、
円弧状部（２）の両端に連ねて配置される左右のフランジ部（３）と、
左右のフランジ部（３）の背面側に起立して配置され、取付ボルトを挿通するボス部（４）と、を備え、
前記ボス部（４）には、溝（１２）又は凸部（１００）が形成される軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast as a core in a light alloy member,
An arcuate part (2) forming a bearing surface;
Left and right flange portions (3) arranged to be connected to both ends of the arc-shaped portion (2);
A boss portion (4) that is arranged upright on the back side of the left and right flange portions (3) and that passes through the mounting bolts,
In the boss portion (4), a ferrous metal bearing cap (1) cast into a light alloy member in which a groove (12) or a convex portion (100) is formed. 請求項１に記載の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
前記ボス部（４）は、前記フランジ部（３）を貫通させて２本のボルト穴（１１）を備えると共にこのボルト穴（１１）を囲む２つのボス（１０）を備え、
前記溝（１２）は、両ボス（１０）間に形成される軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast into the light alloy member according to claim 1,
The boss portion (4) includes two bolt holes (11) penetrating the flange portion (3) and two bosses (10) surrounding the bolt hole (11).
The groove (12) is a ferrous metal bearing cap (1) cast into a light alloy member formed between the bosses (10). 請求項２に記載の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
前記ボス（１０）同士は、先端側において前記ボス（１０）間の溝（１２）を横断して配置したリブ（１３）により連結されている軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast into the light alloy member according to claim 2,
The bosses (10) are made of a ferrous metal that is cast on a light alloy member connected by ribs (13) arranged across the grooves (12) between the bosses (10) on the front end side. Cap (1). 請求項３に記載の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
前記ボス部（４）は、リブ（１３）が配置された位置において互いに連結ビーム（５）により連結されている軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast into the light alloy member according to claim 3,
The boss portion (4) is a ferrous metal bearing cap (1) cast into a light alloy member connected to each other by a connecting beam (5) at a position where the rib (13) is disposed. 請求項４に記載の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
前記ボス部（４）は、連結ビーム（５）が連結された部位の夫々を円弧状部（２）の背面に対して斜め方向に連結する一対の補強ビーム（６）を備える軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast into the light alloy member according to claim 4,
The said boss | hub part (4) is a light alloy member provided with a pair of reinforcement beam (6) which connects each of the site | part with which the connection beam (5) was connected diagonally with respect to the back surface of an arc-shaped part (2). Iron metal bearing cap (1) to be cast. 請求項４又は請求項５に記載の軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）であって、
前記ベアリングキャップ（１）は、前記リブ（１３）及び連結ビーム（５）がある部位で型合せされる鋳造型により鋳造成形される軽合金部材に鋳込まれる鉄系金属製のベアリングキャップ（１）。A ferrous metal bearing cap (1) cast into the light alloy member according to claim 4 or 5,
The bearing cap (1) is a ferrous metal bearing cap (1) that is cast into a light alloy member cast by a casting mold that is matched with the rib (13) and the connecting beam (5). ).
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